BIOL 200 Lecture Notes - Lecture 5: Pilipili, Spirochaete, Treponema Pallidum
Document Summary
Appendage used for swimming mobility by some bacteria and archaea. Bacteria vary with respect to the number and location of flagella. The most widely distributed form of motility (locomotion) in bacteria. The only form of motility so far found in archaea. Energy for rotation supplied by transport of h+ through mot protein. H+ gradient travels from periplasm (outside) to cytoplasm. Drives the motor like atp synthesis in oxidative phosphorylation. A: actual ph of cytoplasm and periplasm do(cid:374)"t (cid:373)atter as long as the combination of the difference in ph and charge makes h+ transport from the periplasm to the cytoplasm energetically favourable. ** proton concentration just has to be higher on the outside ** How do we know bacterial flagella rotate? (cid:894)ca(cid:374)"t see it rotate(cid:895) Bacterial flagella e. coli can rotate in different directions. When the e. coli change direction, the tail/(cid:271)u(cid:374)dle (cid:862)splits(cid:863) or (cid:862)disperses(cid:863) as it (cid:272)ha(cid:374)ges dire(cid:272)tio(cid:374). Like bacterial flagella, they rotate but have no envelope rings.
